Week 15 - Mechanical design NOTES

Here you will find my work description during this fifteenth week

General info

• Course
• Assignment

Assignments

• group assignment:

• design a machine that includes mechanism+actuation+automation
• build the passive parts and operate it manually
• document the group project and your individual contribution

Class notes

Weekly reviews :

• Aitor Aloa (Barcelona) - vinyle record cleaning machine
• Abdulla Ibrahim Alhamad (UAE) - fixed wing aircraft
• Georges Hanna (EchoFab) - interactive lamp
• Murad Saadeh (TechWorks Amman)
• Coral Pereda Serras (Barcelona) - intercatice visual animation
• Jari Uusitalo (Oulu)
• Arnar Dadi Thorisson (Reykjavik) - desk
• Abhinav Garg (AKGEC)
• Tanvir Khorajiya (CEPT) - filament making machine
• Nicolas Newton (UTEC) - filament making machine

Raw class notes

Some interresting links:

• MTM

• openassemblies.com/index.php/rsea/

• gitlab.cba.mit.edu/jakeread/machineweek

• Fiber laser cutter

• Jens & Co CNC machines

• CAM Software (web): Hackaday.io laser gcode generator

• OpenBean CNC Machine

Principles

stress is the force you apply, strain is the respond moduli is ???

There is a lot of plastic you can use, the recommended are HDPE, Delrin (a little bit of elesticity), Aluminium (speed and feeds are lower) using trocoidal? toolpath (circles)

Tslots for beams

pick

• material
• join system
• frame system

Jens cycloid gear

othermill there is a “hole” aroud one shaft spalling when 2 pieces of same material rub together (friction)

sleeve bearing (selflubricant ?)

Delrin on aluminium is a law friction motion

mechanisms

linkages: whippletree pantograph Sarrus (to flex/bend materiel, linear motion axis)